package com.interview.javabasic.thread;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

/*
@李子宁
Happy,happy everyday!
冲鸭！
2021/3/2

*/
public class SemaphoreDemo {

    public static void main(String[] args) {
        //抢车位
        Semaphore semaphore = new Semaphore(3);
        for (int i = 0; i < 6; i++) {
            new Thread(() ->{
                try {
                    semaphore.acquire();
                    System.out.println(Thread.currentThread().getName()+"抢到车位");

                    TimeUnit.SECONDS.sleep(2);
                    System.out.println(Thread.currentThread().getName()+"离开车位");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    semaphore.release();
                }
            },String.valueOf(i)).start();
        }
    }
}
